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Note 4 - Derivative Financial Instruments | 12 Months Ended
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Dec. 31, 2018
Notes to Financial Statements |
Derivative Instruments and Hedging Activities Disclosure [Text Block] |
4. | Derivative Financial Instruments
We periodically utilize derivative instruments for hedging and non-trading purposes to manage exposure to changes in interest rates and to maintain an appropriate mix of fixed and variable-rate debt. At inception of a derivative contract, we document relationships between derivative instruments and hedged items, as well as our risk-management objective and strategy for undertaking various derivative transactions, and assess hedge effectiveness. If it is determined that a derivative is not highly effective as a hedge, or if a derivative ceases to be a highly effective hedge, we discontinue hedge accounting prospectively. We entered into receive fixed-rate and pay variable-rate interest rate swap agreements simultaneously with the issuance of our $250 million of 2.40% senior notes due March 2019 and $350 million of 3.30% senior notes due August 2022, to effectively convert this fixed-rate debt to variable-rate. The notional amounts of these interest rate swap agreements equal those of the corresponding fixed-rate debt. The applicable interest rates under these agreements is based on LIBOR plus an established margin, resulting in an interest rate of 3.63% for our $250 million of 2.40% senior notes and 3.97% for our $350 million of 3.30% senior notes at December 31, 2018. The swaps expire when the corresponding senior notes are due. The fair values of these swaps are recorded in other assets and other long-term liabilities in our Consolidated Balance Sheet at December 31, 2018. See Note 9, Fair Value Measurements, for disclosure of fair value. These derivatives meet the required criteria to be designated as fair value hedges and as the specific terms and notional amounts of these derivative instruments match those of the fixed-rate debt being hedged, these derivative instruments are assumed to perfectly hedge the related debt against changes in fair value due to changes in the benchmark interest rate. Accordingly, any change in the fair value of these interest rate swaps recorded in earnings is offset by a corresponding change in the fair value of the related debt.

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- Definition The entire disclosure for derivative instruments and hedging activities including, but not limited to, risk management strategies, non-hedging derivative instruments, assets, liabilities, revenue and expenses, and methodologies and assumptions used in determining the amounts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -URI http://asc.fasb.org/topic&trid=2229140 + Details
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